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Minimal-disease radioimmunotherapy of colorectal cancer

Award Information

Agency:
Department of Health and Human Services
Branch:
N/A
Award ID:
65365
Program Year/Program:
2003 / SBIR
Agency Tracking Number:
CA103312
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
IMMUNOMEDICS, INC.
300 The American Road Morris Plains, NJ 07950-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2003
Title: Minimal-disease radioimmunotherapy of colorectal cancer
Agency: HHS
Contract: 1R43CA103312-01
Award Amount: $100,000.00
 

Abstract:

DESCRIPTION (provided by applicant): Colorectal cancer accounts for 15% of all cancers, and the 5-year survival rate for patients with metastatic tumors is close to zero. Targeted radiotherapy or radioimmunotherapy (RAIT) has the potential to bring about durable clinical responses in small-volume disease of colorectal cancer. The ultimate goal of the proposed work is to produce a clinically useful, commercially viable, radioimmunotherapeutic for treating minimal-disease of colorectal cancer using a humanized anti-CEA monoclonal antibody (MAb), hMN-14, and an intracellularly trapped form ('residualizing') of iodine-131 radionuclide, I-131-IMPR4. The latter is a specially designed radioiodinated peptide, with structural features to aid in residualization after catabolism of the carrier MAb, which solves the problem of in vivo 'deiodination' associated with directly radioiodinated MAbs. The immediate goal of the Phase I research is to obtain preclinical proof that hMN-14 labeled with I-131-IMPR4 (I-131-IMPR4-hMN-14) is significantly better than directly radioiodinated hMN-14 (I-131-hMN-14) in terms of tumor uptake and retention of radioactivity. This will be determined by (i) comparing in vitro bindings and processing of the two labels by four colorectal cell lines, and (ii) by targeting and maximum-tolerated-dose (MTD)/therapy experiments in a human tumor xenograft model of colon carcinoma in nude mice. A concurrent objective is to improve the achievable specific activity of I-131-IMPR4-hMN-14. Criteria of success will be the findings of (1) a 50-200% increase in tumor-cell retention of radioactivity of I-131-IMPR4 label versus direct I-131 label in in vitro experiments, (2) a preliminary evidence of therapeutic advantage for the residualizing I-131 versus direct I-131 label in the preclinical MTD/therapy study, and (3) specific activity enhancement to 10 mCi/mg in radioiodinations with I-131-IMPR4. Successful feasibility study will lead to extended preclinical therapy studies and the initiation of a clinical Phase I RAIT trial in a SBIR Phase II program.

Principal Investigator:

Serengulam V. Govindan
9736058200
SGOVINDAN@IMMUNOMEDICS.COM

Business Contact:

Cynthia Sullivan
9735409595
CSULLIVAN@IMMUNOMEDICS.COM
Small Business Information at Submission:

IMMUNOMEDICS, INC.
IMMUNOMEDICS, INC. 300 AMERICAN RD MORRIS PLAINS, NJ 07950

EIN/Tax ID: 611009366
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No